is my goldfish pregnet?

well a cupple of days ago i saw wat looked like black DIRT on my gold fishes face i dont no y it just apperid this is my firstfish and i dont no wat to do also hes starting to get a bulg on hes or her stomach hes/she a fan tail with orange sploges on him hes arowned 3 cm long and i think hes/shes fully grown but im not sure how old he/she is but its very active but just then i checked on him and well he wasent moving for a bit and now i think she might be pregnet